问题
解答题
解下列方程.
7(x-4.3)=25.2;
(1.2x+3.5)×5=35.5.
答案
(1)7(x-4.3)=25.2
7(x-4.3)÷7=25.2÷7
x-4.3+4.3=3.6+4.3
x=7.9;
(2)(1.2x+3.5)×5=35.5
(1.2x+3.5)×5÷5=35.5÷5
1.2x+3.5-3.5=7.1-3.5
1.2x÷1.2=3.6÷1.2
x=3.
解下列方程.
7(x-4.3)=25.2;
(1.2x+3.5)×5=35.5.
(1)7(x-4.3)=25.2
7(x-4.3)÷7=25.2÷7
x-4.3+4.3=3.6+4.3
x=7.9;
(2)(1.2x+3.5)×5=35.5
(1.2x+3.5)×5÷5=35.5÷5
1.2x+3.5-3.5=7.1-3.5
1.2x÷1.2=3.6÷1.2
x=3.